how does muscle fibres bring about movement by shortening the muscle fibre?
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During contraction, the muscles fibres shorten, the muscle pulls on the ligaments that connect the bones and the movable body parts. During relaxation the muscle fibres come to their original position. This movementof muscles cells or the muscle fibresresults in the movement of the body parts.
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The muscle cells move by contraction and relaxation by utilizing the energy in the form of ATP.During contraction, the muscles fibres shorten, the muscle pulls on the ligaments that connect the bones and the movable body parts. During relaxation the muscle fibres come to their original position.
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